Joint.



UNITED STATES Patented June 28, 1904.

PATENT OFFICE.

THOMAS F. GREENWOOD, OF PROVIDENCE, RHODE ISLAND ASSIGNOR TO DAVID M.WATKINS AND FREDERICK H. WATKINS, OF PROVIDENCE,

RHODE ISLAND, DOING BUSINESS AS D. M. WATKINS & COMPANY, A

FIRM.

SPECIFICATION forming part of Letters Patent No. 763,483, dated. June28, 1904. Application filed February 1, I902. Serial No. 92,124. (Nomodel.)

To 0,7,] whom it may concern.-

Beit known that LTnoMAs F. GREENWOOD, a resident of Providence, in thecounty of Providence and State of Rhode Island, have invented certainnew and useful Improvements in Joints; and I do hereby declare that thefol tion of a simple and inexpensive pin-tongue provided with a maximumbearingsurface, whereby lateral play of the pin in its support isentirely overcome.

A further object isto provide a simpleand eflicient connection betweenthe pin-tongue and its supporting-pivot.

A further object is to provide means whereby the resiliency or springaction between the pin-pivot and the pin-catch is greatly increased.

A further object is to provide a pin-tongue which may be securelymounted in its supporting-cup without heading over the pivotpm.

The invention will be hereinafter fully set forth, and particularlypointed out in the claims.

In the accompanying-drawings, Figures 1 and 2 are side views of a pinand plate, partly in section, illustrating my invention. Fig. 3 is a topview of the joint. Fig. 4 is an enlarged detail view of the joint end ofthe pin. Fig. 5 is a sectional view on line 5 5, Fig. v3.

Referring to the drawings, A designates the pin-tongue, preferablyformed of a single piece of wire bent back upon itself to form a hookand flattened, as indicated at A, a hole or opening B being formed toreceive the pivotpin B. By this arrangement the completed pin isprovided with a spring-arm O. In practice I prefer to first bend ordouble up a piece of wire to form the arm O and then compress or sWagesaid doubled portion in suitable dies to flatten the sides and squarethe edges. The

hole B is then formed in any suitable manner, the same being preferablyof smaller diameter than the diameter of the pivot-pin B,

'structing the same which would not depart from the spirit of myinvention.

The plate or brooch F is provided with a cup C, formedwith parallelears, between which the hook end of the pin-tongue is adapted to fit,with the opening B thereof coinciding with the openingsE. When in thisposition, the pivot-pin B is passed through said coinciding openings andcut off flush with the outer walls of said ears, whereby heading over ofthe pivot-pin is rendered 'unneccessary. Another and convenient way ofassembling the parts is to first make the pivot-pin B of the desiredlength and. insert same in opening B of the pin-tongue. The hook end ofthe latter is then inserted between the sides of the cup C and saidsides pressed together, whereupon the ends of pin B will be supported inthe openings E; The plate F is also provided with the usual keeper D toengage the free end of the pin A.

The ad vantages of my invention will be at once apparent to thoseskilled in the art to which it appertainsQ It will be particularly notedthat by bending over the end of the pin and flattening the samethe'flattened bent end affords an increased bearing-surface, allowingthe inner faces of the cup to fit closely thereagainst, whereby anabsolutely rigid joint is secured and 'lateralplay entirely overcome. Itwill be further seen that this result is obtained with a pin-tongueformed entirely from a single piece of round wire. It will be furtherobserved that flattening the bent end of the pin-tongue squares up theedges and facilitates the formation of a bore or aperture.

A further advantage of securing the piv'ot-pinin the return-bend bypressure is that heading over of the ends of said stud is renderedunnecessary. It Will also be observed that the resiliency and efliciencyof the spring-arm is greatly increased and enhanced by flattening thebent end of the pin-tongue and fitting the same snugly between the wallsof the supporting-cup to overcome lateral play. It will be further notedthat when the pin-tongue is in engagement with the keeper the-pressureupon the spring-arm of the bent end is in creased, whereby the latter iscaused to more tightly grip the pivot-pin. This is of particularadvantage Where the said pivot-pin is held in the bent end of thepin-tongue by pressure.

I claim as my invention 1. A pin-tongue having one end bent over, saidbent end being provided with a substantially cylindrical bore oraperture, and a pivotpin secured in said bore or aperture by pressure.

2. A pin-tongue having one end provided with ab'end, and a pivot-pinsecured in said bend solely by pressure.

3. A pin-tongue having one end provided with a bend, and a pivot-pinsecured in said bend by spring-pressure.

4. A pin-tongue having one end bent over and flattened said bent endbeing provided with a substantially cylindrical bore or aperture, and apivot-pin secured in said bore or aperture by pressure.

5. A pin-tongue having one end bent over to form a hook portion, acylindrical bore or aperture being formed in said bend.

6. A pin-tongue having one end bent over to form a hook portion, a boreor aperture being formed in said bend, said bore or aperture being ofsubstantially uniform cross-section.

7. A pin-tongue having one end bent over to form a hook portion, and apivot-pin secured in said bend.

8. A pin-tongue bent over to form a hook portion, and a pivot-pin havinga substantially uniform cross-section, said pivot-pin being secured insaid bend.

9 A pin-tongue having one end bent into substantially V shape, a bore oraperture being formed near the apex of the bend, and a pivot-pin securedin said bore or aperture.

10. A pin-tongue having one end bent into substantially V shape, a boreor aperture being formed near the apex of the bend, and a pivot-pinsecured in said bore or aperture, said pin having a substantiallyuniform crosssection.

11. In a device of the character described, the combination with apin-tongue having one end bent over to form a hook portion, a pivotpinsecured in said bend, a plate, and a cup mounted on said plate andadapted to receive the ends of said pivot-pin.

12. In a device of the character described, the combination with apin-tongue having one end bent over to form a hook portion, a pivotpinof substantially uniform cross-section secured in said bend, a plate,and acup mounted on said plate and adaptedto receive the ends of saidpivot-pin.

13. In a device of the character described, the combination of a pinhaving a hook-shaped portion at one end inclosing a substantiallycylindrical bore, a pivot secured in said bore by pressure, a plate, anda cup mounted on the plate and arranged to loosely engage the ends ofthe pivot.

14. In a device of the character described, the combination of a pinhaving a resilient hook-shaped portion at one end inclosing asubstantially cylindrical bore, a pivot secured in said bore byspring-pressure, a plate, and a cup mounted on the plate and arranged toloosely engage the ends of the pivot.

In testimony whereof I have hereunto set my hand this 30th day ofJanuary, A. l). 1002.

THOMAS F. GREELWVOOI).

In presence of .H. E. BARLOW, BENJ. ARNOLD.

